Kinetic interactions of CO, NOx, and HCI emissions in postcombustion gases,

Roesler, J. F.; Yetter, Richard A.; Dryer, Frederick L.

doi:10.1016/0010-2180(94)00228-k

Cited by 83 publications

(47 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chlorine chemistry mechanism consists of 36 elementary reactions involving 7 chlorine-containing species [12]. Thermodynamic data were taken from the database of Burcat [32] or otherwhere [24,33].…”

Section: Kinetic Modeling and Discussionmentioning

confidence: 99%

“…Such superequilibrium concentrations of free radicals are quite normal in combustion chemistry, and are sustained by the free energy liberated by the combustion process [35]. At 800-1200 K, CO is mainly consumed by the reaction CO + OH => CO 2 + H [12]. Because HCl may act as inhibitors by catalyzing the recombination of radicals (e.g.…”

Section: Kinetic Modeling and Discussionmentioning

confidence: 99%

“…Results show that the concentration of H 2 O has a strong effect on the post-combustion CO oxidation. Furthermore, the interactions occurring between CO, NO x , and HCl show that the inhibitory effect of HCl is sensitive to the concentration of H 2 O and NO and NO plays a catalytic role in the oxidation of CO in post-combustion gases [12,13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of HCl on CO and NO emissions in combustion

Wei¹,

Wang²,

Dian-fu³

et al. 2009

Fuel

View full text Add to dashboard Cite

a b s t r a c tThe influence of HCl on CO and NO emissions was experimentally investigated in an entrained flow reactor (EFR) and an internally circulating fluidized bed (ICFB). The results in EFR show the addition of HCl inhibits CO oxidation and NO formation at 1073 K and 1123 K. At the lower temperature (1073 K) the inhibition of HCl becomes more obvious. In ICFB, chlorine-containing plastic (PVC) was added to increase the concentration of HCl during the combustion of coal or coke. Results show that HCl is likely to enhance the reduction of NO and N 2 O. HCl greatly increases CO and CH 4 emission in the flue gas. A detailed mechanism of CO/NO/HCl/SO 2 system was used to model the effect of HCl in combustion. The results indicate that HCl not only promotes the recombination of radicals O, H, and OH, but also accelerates the chemical equilibration of radicals. The influence of HCl on the radicals mainly occurs at 800-1200 K.

show abstract

Section: Kinetic Modeling and Discussionmentioning

confidence: 99%

Section: Kinetic Modeling and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of HCl on CO and NO emissions in combustion

Wei¹,

Wang²,

Dian-fu³

et al. 2009

Fuel

View full text Add to dashboard Cite

show abstract

“…During combustion HCl and SO x are released into the flue gas as pollutants. It is known that HCl and SO x may affect the ratio and compositions of the radicals O, H, OH, and HO 2 in the flame [1,2]. Therefore, complex interactions of HCl, SO x , CO, NO x , and H 2 O, etc.…”

Section: Introductionmentioning

confidence: 99%

Interactions of CO, HCl, and SOx in pulverised coal flames

Wei

Schnell

Han

et al. 2004

Fuel

View full text Add to dashboard Cite

The effect of HCl and SO 2 on CO oxidation in pulverised coal flames was investigated experimentally and kinetically in an entrained flow combustion reactor. Two bituminous coals (German 'Goettelborn' and a Polish coal) were used as fuels with a feeding rate of 1 or 1.5 kg/h. HCl or SO 2 is introduced into the reactor premixed with the primary air. Experimental results indicate that HCl addition may inhibit CO oxidation in coal flames and increases CO emission. Reducing temperature in the reactor will enhance the inhibitory effect of HCl on CO oxidation. The measured CO profiles along the reactor height clearly show that the addition of HCl may inhibit CO oxidation. In the experimental range of SO 2 addition, the inhibiting effect of SO 2 on CO oxidation is less significant than HCl. A detailed kinetic mechanism is used to model the reactions, and the controlling reactions are analysed. q

show abstract

“…25,26 It was further extended with 36 elementary reactions describing HCl oxidation and interactions between nitrogen and chlorine species. 27,28 The thermodynamic data for the elementary scheme were taken from Kee et al, 29 Glarborg et al, 30 and Mueller et al…”

Section: 21mentioning

confidence: 99%

Urea as a PCDD/F Inhibitor in Municipal Waste Incineration

Ruokojärvi

Asikainen

Ruuskanen

et al. 2001

Journal of the Air & Waste Management Association

View full text Add to dashboard Cite

Emissions of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) from municipal waste incineration have been widely studied because of their extensive toxicity, and many efforts have been made to restrict their emissions. Although a number of chemical compounds have been shown in laboratory-scale tests to inhibit the formation of PCDD/Fs, few have been tested in pilot-or full-scale plants. This work evaluates the effect of urea as a PCDD/F inhibitor in a pilot-scale incinerator that uses refuse-derived fuel (RDF). The decomposition of urea under the test conditions was also studied using detailed kinetic modeling. An aqueous solution of urea was injected into the flue gas stream after the furnace at ~730 °C, with varied urea concentrations and flue gas residence times used between the furnace and the sampling point. The results demonstrate that urea can successfully inhibit PCDD/F formation in waste incineration if concentrations and injection points are properly adjusted. The kinetic model showed that urea can be rapidly decomposed under appropriate flue gas conditions, indicating that in IMPLICATIONS Several chemical compounds have been shown to inhibit the formation of PCDD/Fs in laboratory tests. In the present work, the effect of urea-a fairly low-cost, lowtoxic chemical-as a PCDD/F inhibitor was studied in a pilot-scale plant using RDF. The results indicate that urea can be used successfully as a PCDD/F inhibitor in waste incineration if its amount and injection point are properly adjusted.

show abstract

Kinetic interactions of CO, NOx, and HCI emissions in postcombustion gases,

Cited by 83 publications

References 16 publications

Influence of HCl on CO and NO emissions in combustion

Influence of HCl on CO and NO emissions in combustion

Interactions of CO, HCl, and SOx in pulverised coal flames

Urea as a PCDD/F Inhibitor in Municipal Waste Incineration

Contact Info

Product

Resources

About